BuildDTOsFromExcel.FileService.FileSystemService.GetFiles C# (CSharp) Метод

        public IEnumerable<string> GetFiles(string directory, string searchPattern)
        {
            if (String.IsNullOrEmpty(directory))
            {
                directory = Directory.GetCurrentDirectory();
            }

            DirectoryInfo directoryInfo = new DirectoryInfo(directory);
            FileInfo[] files = directoryInfo.GetFiles(searchPattern, SearchOption.AllDirectories);
            foreach (FileInfo file in files)
            {
                yield return file.FullName;
            }
        }